How a Sundial Works: Ancient Timekeeping Explained #235081 (License: Personal Use)

This illustration depicts a horizontal sundial featuring a flat circular dial marked with hour lines and a triangular gnomon that casts a shadow as the sun moves across the sky. The gnomon is angled to match the observer’s latitude, ensuring accurate timekeeping based on solar position. Such devices were widely used before mechanical clocks and remain valuable for understanding celestial mechanics and historical timekeeping methods.

Used in educational articles, museum exhibits, or astronomy resources to explain solar time measurement; targets users seeking historical, scientific, or DIY timekeeping knowledge.